#include<iostream>
#include<stdio.h>
using namespace std;
int q,n,l,cuv,start;
int main()
{
	FILE*f;f=fopen("text.in","rb");
	while(!feof(f))
	{
		fscanf(f,"%c",&n);
		if((n>=97 && n<=122)||(n>=65 && n<=90))
		{
			l++;
			if(start==0)
				start=1;
		}
		else 
		{
			if(start)
			{
				start=0;
				cuv++;
			}
		}
	}
	fclose(f);
	if((n>=97 && n<=122)||(n>=65 && n<=90))
	{
		cuv++;
		l=l-1;
	}
	FILE*g;g=fopen("text.out","wb");
	fprintf(g,"%d",l/cuv);
			
}